Valve-spring compressor



Ocfl,l 1924. 1,510,542

W. C.v BURROWS VALVE SPRING COMPRESSOR A Filed Sept. 4, 1923 Patented Ust. 7, 1924.

WILLIAM C. BURROWS, OF PROVIDENCE, RHODE ISLAND.

. VALVE-SPRING COMPRESSOR.

Application filed September@ y1923. SeraLNo. 660,822.

To @ZZ whom t may concern:

Be it known that I, WILLIAM'C. BURRows,

a citizen of the United States, v.residing at Providence, in the county of Providence and y State of Rhodelsland, lhave invented certain new and useful Improvements in Valve- Spring Compressors, of whichthe following is a specication.

This invention relates to improvements in the lconstruction of valve spring compressor employed more particularly to facilitate the removal of motor valves ;v and the object of this invention is to provide simple and practical construction for such alifter which is strong and durable Y andY which is susceptible of quick operation to be readily placed in operative position on an engine or motor and quickly operated vto compress the valve spring and to be locked in spring compressed position. l

A further object of the invention is to so construct the device that it may be readily adjusted to operate upon machines of different sizes and designs.

The invention furtherfconsists in the provision of an automatic lock for retaining the parts in adjusted position, the operating handle of the lock being arranged to ,extend into proximity with the operating lever,

whereby the hand which operates Vthe lever to compress the spring may also serve `to release the lock and permit lthe return of the presser member back tospring release position.

" scribed, and particularly pointed out in the appended claims.

In the accompanying drawlngs:

Figure 1 is a side elevation Ypartly in sectionof my improved valve spring compressor. v f

Figure 2'is a top v iew'of thev device.

Figure 3 is a plan view of the presser foot removed from the frame.v f

Figure 4 is a sectional elevation ofthe hub to which the operating lever is connected.

50. Figure-ais -a frontV latch removed.

*View ofl the v spring Figure 6 is a front View of the fork in nhich the reel or pulley is rotatably mounte Figure isa detailedi perspective view of the pivoted lock yoke.

'Figure 8 isa topfview kshowing the lock yoke in position to engage the lock pin.

Figure 9 is a side elevation showing the lock yoke in operative position.

VWith reference to the drawings, l() designates the frame portion of this device, which is preferably formed of a metal rod threaded as at l1 at its upper end. Its lower portion 12 is offset inwardly and its extremity is threaded and screwed into the T-shaped iitting 14.

The presser foot-plate l5 is provided with a threaded sha-nk 16 whichV is screwed into the horizontal portion of the T-fitting 14 and bound in adj ustedy position by the `nut 18, by which construction the 'frame may be laterally adjusted to fit any type of motor to which the device may be applied. The outer end of this presser foot plate is forked as at 17 to straddle the valve stem 18 and extend in under the valve spring 19.V

On the upper end of this frame is thread- Ved a T-shaped fitting 20 which is bound in position by nuts 21 and 22. The horizontally-extending neck portion of this fitting is greatly elongated tosecure the threaded end of av laterally-extending arm .23, which arm is locked thereinin adjusted position by a y Y nutl 24. On the outer endv of the arm is With these and other objects in view, the invention consists of ycertainnovel features' of construction, as 'will be more -fully demountedya bearing' member 25 which is threaded at'26to, receive the threaded lend ofthe yarm 23 and thisl bearing is provided with a vertically-disposed hole 27' Iin whic a spindle 28iis slidably mounted.

forkedl head is rotatably mounted aflifterp.

pulley 33.

In order to lift the frame relatively to this spindle so as to' compress the valve spring below, I have connected va flexible connector preferably in the shape of a 9o The lower'end of this spindleis pointed i sprocket chain 34 at one end to the arm 23, and its opposite end is connected as at 36 to an opening in the pulley 83.

This pulley is fixed on a shaft 37, the outer end 38 of which is squared, and on this squared portion is fixed a hub 39, the same being drilled and tapped as at 40 in several different places around its periphery to receive an operating handle 41, whereby a downward swinging movement of this operating handle rotates the pulley to wind the chain upon its face thereby imparting a relatively lifting` motion to the frame.

l/Vhen the frame has been lifted so that its bearing member 25 abuts against the under shoulder of the spindle head, the valvev spring 19 is compressed and as it isy of importance to retain thespring in this compressed position, I have mounted a pin 42 in the hub of the forked head and I may secure a fiat spring detent 43 by means of screws 44 to the bearing member 25, which detent is provided with a hole 45 to receive the pin 42 whereby an upward movement of this head causes thespring to engage and snap over the pin, and this spring is provided with a laterally-extending, operating arm 46 projecting into proximity to the operating lever 41, after the lever has been swung down to compress the valve spring 19, whereby a finger of the hand which engages the operating lever may be caused to bend the spring downwardly and withdraw itfrom engagement'with the pin 42 thereby releasing the head from the frame permitting relativer movement between the two for the purpose of dropping the frame to release the valve spring 19.

In some instances, however, in the practicall operation of the device, it is found necessary to swing the head on the axis of its spindle 28 to permit the operating handle 41 to clear some obstruction, and in order to provide a dentent or lock which will retain the frame in raised position while the head is turned at an angle, I have constructed-a yoke-shaped latch 47 which is pivoted on its inturned ends 49 in the bearing 25, the bridge 50 of the yoke being on the arc of a circle to itabout the hub of the head whereby it is adapted to 'engage the lock pin 42 evenv though the head is in a partially rotated position.'

My improved valve compressing device is very' simple and practical in construction and 'effective in its operation and is so designed that it may be quickly' applied to an engine valve to compress the spring thereof and be quickly removed for the purpose of permitting a grind-ing action upon the valve, and also theA frame adjustments of the device permit it to bev operated on engines of widelydiiferent types.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims:

I claim:

1. A, valve spring compressor comprising a frame having a presser foot-plate at its lower end shaped to straddle the valve stem and engaging the spring to be compressed, an upper laterally extending'arm on said frame having a bearing, a spindle slidable in said bearing adapted to engage the top of the valve, a yoke on said spindle, a lever operated reel in said yoke, and a flexible connector attached to said reel to lift the frame and said spindle as the reel is rotated.

2. A valve spring compressor comprising a frame having a presser foot at its lower end and shaped to straddle the valve stem and engage the spring to be compressed, an upper laterally extending arm mounted to be vertically adjusted on said frame, a spindle vertically slidable in said arm, a pulley rotatably mounted on said spindle, a flexible connector leading from the arm to said pulley, a lever for rotating said pulley to wind the connector thereon and lift the frame and cause its bearing to slide on said spindle, and a latch for retaining the frame in adjusted position.

3'. A valve springI compressor comprising a frame having a presser foot member at its lower end shaped to straddle the valve stem and engage the spring to be compressed, an upper laterally extending arm mounted to be vertically adjusted on; said frame, a spindle vertically slidable in said arm, means including a lever for lifting the frame on said spindle and compress the spring below, and a latch for retaining the spindle in spring compressed position, said latch having its engaging portion formed on the arc of a circle to engage the locking member when said frame is in spring-compressed position even though the head is partially rotated on its axis,`

4. A valve spring compressor comprising a frame formed; ofl a rod having its lower portion inwardly offset and its end turned downwardly and connected to a T-shaped fitting, a presser foot having a threaded shank endwise adjustably mounted in said fitting, an upper endwise adjustable and laterally extending guide arm connected to the upper portionof said frame, a valve presser spindle in said arm., and means for imparting a relatively vertical movement to said frame and spindle to compress the spring.

5. A` valve spri` g; compressor comprising a frame having a presser foot` member at; its

lower end shaped to straddle the valve stem and engage the spring to be compressed, an upper laterally extending arm mounted to be vertically adjusted on said frame, a spindle vertically slidable in said arm, Ineens including a lever for lifting the frame on said spindle and compress the spring below,

and means whereby said presser foot member and seid upper arm may be adjusted to move the frame toward and from the spindle.

In testimony whereof I afix my signature.

WILLIAM C. BURROWS. 

